Khan’s weight ties for the lowest he has fought at in six bouts as a 140-pounder. The last time Khan tipped the scales at that mark was for his six-round technical decision victory over Paul McCloskey in April.

Khan (26-1, 18 KOs) takes an eight-bout winning streak that includes four knockouts into the matchup against Peterson (29-1-1, 15 KOs), who is 2-0-1, with two knockouts since falling to Tim Bradley (28-0, 12 KOs) by unanimous decision in December of 2009.

In the co-feature, heavyweight prospect Seth Mitchell, (23-0-1, 17 KOs), of Brandywine, Md., weighed in at 240.5 pounds, and his counterpart, Timur Ibragimov (30-3-1, 16 KOs), of Uzbekistan, at 221.

For Ibragimov, the weight was the lightest he has been in 12 fights, last tipping the scales at 219 for a unanimous decision loss to Calvin Brock in June of 2006.

Also on the card is a bout featuring Lamont Peterson’s younger brother, lightweight standout Anthony Peterson (30-1, 20 KOs), who weighed in at 137 pounds — one more than his rival and fellow Washingtonian, Daniel Attah (26-8-1, 9 KOs).